Fix cmake libusb search and fix libusb include

Adjust cmake test for libusb library so that the compatible libusb for
freebsd can be found.  Since freebsd's libusb header are located in a
different place from libusb-1.0, the includes in the source code must be
adjusted using #include <libusb.h>.  Actually those new include statements
are those that libusb-1.0 really expects to be used (see libusb-1.0.pc
cflags to verify this). With this commit, libfreenect is buildable on
freebsd.

Signed-off-by: Nicolas Bourdaud <nicolas.bourdaud@gmail.com>

Author: nbourdau

cmake_modules/Findlibusb-1.0.cmake

@@ -49,7 +49,7 @@ if (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)
 else (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)
   find_path(LIBUSB_1_INCLUDE_DIR
     NAMES
-	libusb-1.0/libusb.h
+	libusb.h
     PATHS
       /usr/include
       /usr/local/include
@@ -61,7 +61,7 @@ else (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)
 
   find_library(LIBUSB_1_LIBRARY
     NAMES
-      usb-1.0
+      usb-1.0 usb
     PATHS
       /usr/lib
       /usr/local/lib
@@ -95,4 +95,4 @@ else (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)
   # show the LIBUSB_1_INCLUDE_DIRS and LIBUSB_1_LIBRARIES variables only in the advanced view
   mark_as_advanced(LIBUSB_1_INCLUDE_DIRS LIBUSB_1_LIBRARIES)
 
-endif (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)
+endif (LIBUSB_1_LIBRARIES AND LIBUSB_1_INCLUDE_DIRS)

src/usb_libusb10.c

@@ -29,7 +29,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <libusb-1.0/libusb.h>
+#include <libusb.h>
 #include "freenect_internal.h"
 #include "loader.h"
 

src/usb_libusb10.h

@@ -28,7 +28,7 @@
 #define USB_LIBUSB10
 
 #include "libfreenect.h"
-#include <libusb-1.0/libusb.h>
+#include <libusb.h>
 
 #if defined(__APPLE__)
 /*